javacript验证gridview模板列

Code
function ValidateGridViewScore()
    {
        var date=new Date();
        var y=date.getYear();   
        if(y<10) y="0"+y;   
        var m=date.getMonth()+1;   
        if(m<10) m="0"+m;   
        var d=date.getDate();   
        if(d<10) d="0"+d; 
        var timeNow=y+"-"+m+"-"+d;
        var txtKSTime=document .getElementById ("txtKssj");
        var ddlstGradeLx= document .getElementById ("ddlstGradeLx"); 
        var gv=document .getElementById ("gvGradeInput");
        var txtCj_Ps_Bl=document .getElementById ("txtPscjBl");
        var txtCj_Test_Bl=document .getElementById ("txtSycjBl");
        var txtCj_Jm_Bl=document .getElementById ("txtJmcjBl");
        if(txtKSTime.value.length==0)
        {
            alert("请选择考试时间！");
            return false;
        }
        else
        {
            if(txtKSTime.value>timeNow)
            {
                alert("所选择的考试时间不能大于当前时间！");
                return false;
            }
        }
        if(ddlstGradeLx.selectedIndex==0) 
        {
            alert("请选择保存总评成绩格式！");
            return false;
        }  
        if(txtCj_Ps_Bl.value.length==0&&txtCj_Test_Bl.value.length==0&&txtCj_Jm_Bl.value.length==0)
        {
            alert("比例设置不能为空！");
            return false;
        }
        var btnSave=document .getElementById ("btnSubmit");
        var flag=0;
        var flagCj=0;
        var flagZCj=0;
        var txtKSTime=document .getElementById ("txtKssj");
        var ddlstGradeLx=document .getElementById ("ddlstGradeLx"); 
        var pscjBl=document .getElementById ("txtPscjBl");
        var sycjBl=document .getElementById ("txtSycjBl");
        var jmcjBl=document .getElementById ("txtJmcjBl");
        var array=new Array();
        for(m=0;m<gv.rows.length;m++)
        {
            for(n=0;n<4;n++)
            {
                array[m,n]=0;
            } 
        }
        if(pscjBl.value.length>0&& sycjBl.value.length>0&&jmcjBl.value.length>0) 
        {
            pBl=parseInt(pscjBl.value);
            sBl=parseInt(sycjBl.value);
            jBl=parseInt(jmcjBl.value);
            if((pBl+sBl+jBl)!=100)
            {
               alert ("比例之和必须为100%");
               return false ;
            }
            else
            {
              for( i=1;i<gv.rows.length;i++)
              {
                  var score_ZCj=document.getElementById(gv.rows[i].cells[5].firstChild.id).value;
                  if(score_ZCj==""||score_ZCj==null)
                  {
                      flagZCj=1;
                  }
              }
             if(flagZCj==0)
             {
               for( i=1;i<gv.rows.length;i++)
               {
                  for(m=0;m<gv.rows.length;m++)
                  {
                    for(n=0;n<4;n++)
                    {
                        array[m,n]=0;
                    } 
                  }
                  var txtCj_Ps=document.getElementById(gv.rows[i].cells[2].firstChild.id)
                  var txtCj_Test=document.getElementById(gv.rows[i].cells[3].firstChild.id)
                  var txtCj_Jm=document.getElementById(gv.rows[i].cells[4].firstChild.id)
                  var txtCj_Total=document.getElementById(gv.rows[i].cells[5].firstChild.id)
                  var score1=txtCj_Ps.value;
                  var score2=txtCj_Test.value;
                  var score3=txtCj_Jm.value;
                  var score4=txtCj_Total.value;
                  if(score1==""||score1==null)
                  {
                    score1=0;
                  }
                  if(score2==""||score2==null)
                  {
                    score2=0;
                  }
                  if(score3==""||score3==null)
                  {
                    score3=0;
                  }
                  if(score4==""||score4==null)
                  {
                    flagZCj=1;
                  }
                  txtCj_Ps.style.color = "black";
                  txtCj_Test.style.color = "black";
                  txtCj_Jm.style.color = "black";
                  txtCj_Total.style.color = "black";
                  if(score1<0||score1>100||score2<0||score2>100||score3<0||score3>100||score4<-3||score4>100)
                  {
                     if(score1<0||score1>100)
                     {
                        array[i,0]=1;
                        flag=1;
                     }
                     if(score2<0||score2>100)
                     {
                        array[i,1]=2;
                        flag=1;
                     }
                     if(score3<0||score3>100)
                     {
                        array[i,2]=3;
                        flag=1;
                     }
                     if(score4<-3||score4>100)
                     {
                        array[i,3]=4;
                        flag=1;
                     }
                     for(var j=0;j<4;j++)
                     {
                        if(array[i,j]==1)
                        {
                            txtCj_Ps.style.color = "red";
                        }
                        if(array[i,j]==2)
                        {
                            txtCj_Test.style.color = "red";
                        }
                        if(array[i,j]==3)
                        {
                            txtCj_Jm.style.color = "red";
                        }
                        if(array[i,j]==4)
                        {
                            txtCj_Total.style.color = "red";
                        }
                     }
                  }
                  
                  else
                  {
                    if(score1!=0||score2!=0||score3!=0)
                    {
                      if(score1>=0&&score2>=0&&score3>=0&&score4>=0)
                      {
                         var ZCj=(parseInt(score1)*pBl +parseInt(score2)*sBl +parseInt(score3)*jBl)/100;
                         var Cj=parseInt(score4);
                         if(Math.abs(ZCj-Cj)>1)
                         {
                            txtCj_Ps.style.color = "red";
                            txtCj_Test.style.color = "red";
                            txtCj_Jm.style.color = "red";
                            txtCj_Total.style.color = "red";
                            flagCj=1;
                         }
                         else
                         {
                            txtCj_Ps.style.color = "black";
                            txtCj_Test.style.color = "black";
                            txtCj_Jm.style.color = "black";
                            txtCj_Total.style.color = "black"; 
                         }
                      }
                      else
                      {
                         if(score4==-1||score4==-2||score4==-3)
                         {
                            txtCj_Total.style.color = "black";
                         }
                      }
                    } 
                  }
               }
             }
               if(flagZCj==1)
               {
                   alert("总成绩不能为空，可以为零！");
                   return false;
               }
                if(flag==1||flagCj==1)
                {
                    if(flag==1)
                    {
                        btnSave.disabled =true ; 
                        alert("成绩数值必须在0到100之间！总成绩可以为-1，-2，-3！不合格的成绩将会以红色字体显示！");
                    }
                    if(flagCj==1)
                    {
                        btnSave.disabled =true ; 
                        alert ("平时成绩*比例+实验成绩*比例+卷面成绩*比例之和不等于总成绩！将会以红色字体显示不正确的成绩！");
                    }
                }
                else
                {
                    btnSave.disabled =false; 
                    alert ("可以录入，点击提交按钮录入成绩！");
                }
           }
        }
    }