js代码

<script type="text/javascript" charset="utf-8">
      	mui.init();
      	window.onload = function()
      	{
      		var oInput = document.getElementsByTagName("input");
      		var nZuowen = document.getElementById("zuowen");
      		var nTla= document.getElementById("tla");
      		var nTlb = document.getElementById("tlb");
      		var nTlc = document.getElementById("tlc");
      		var nTz = document.getElementById("tz");
      		var nPd = document.getElementById("xz");
      		var nYd = document.getElementById("yd");
      		var nFy = document.getElementById("fy");
      		var nInput = document.querySelectorAll("input");
      		var oJs = document.getElementById("js");
      		var oZf = document.getElementById("zf");
      		var oQk = document.getElementById("qk");
      		for( var i =0;i<oInput.length;i++ )
      		{
      			oInput[i].style.width="100px";
      		}
      		function clear(){
      			this.value="";
      			this.style.opacity = 1;
      		}
      		nZuowen.onclick = function()
      		{
      			this.value = "";
      			this.style.opacity = 1;
      		}
      		
      		for(i = 0;i<oInput.length-3;i++)
      		{
      			oInput[i].onfocus = function()
      			{
      				this.value = "";
      			this.style.opacity = 1;
      			}
      		}
      		for( i=oInput.length-1;i>oInput.length-4;i--)
      	{
      		oInput[i].style.opacity = 1;
      		
      	}
      	
      	
      	//计算总分
      	oJs.onclick = function()
      	{
      		var sum = 0,num=0;
      		for(i=0;i<oInput.length-3;i++)
      		{
      			if((num=Number(oInput[i].value)) !=NaN)
      			sum+=num;
      		}
      		oZf.value = sum;
      	}
      	//清空操作
      	oQk.onclick = function()
      	{
      		for(i=0;i<oInput.length-3;i++)
      		{
      			oInput[i].value = "";
      			oInput[i].style.opacity = 1;
      			oInput[0].focus();
      		}
      	}
      	}      	
    </script>