求最大值

vararr= [12,12,45,78,1,3,8,8,12,454,9,16,16,30,"string","numder"];

Array.prototype.max=function(){//数组最大值

varm=this[0];

for(vari=0;i

if(m

m=this[i];

}

}

returnm;

}

alert(arr.max());