07 JS元素操作

• JS生成随机数

 

Execute Javascript        function rand ( n ){return ( Math.floor ( Math.random ( ) * n + 1 ) );};var aa = rand(100);var div = document.getElementById('ContractCode');div.setAttribute("value", aa);

 

 

• 修改元素属性值

 

var div = document.getElementById('UseCostInfo');

div.setAttribute("onmouseover", "");