<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<script type="text/javascript">
window.onload=function(){
var mydiv=document.getElementById("mydiv");
mydiv.setAttribute("id","newid");
alert(mydiv.getAttribute("id"));
}
</script>
</head>
<body>
<div id="mydiv"></div>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<script type="text/javascript">
window.onload=function(){
var mydiv=document.getElementById("mydiv");
mydiv.setAttribute("newAttr","attrValue");
alert(mydiv.getAttribute("newAttr"));
}
</script>
</head>
<body>
<div id="mydiv"></div>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<style type="text/css">
.textcolor{
font-size:18px;
color:red;
}
</style>
<script type="text/javascript">
window.onload=function(){
var mydiv=document.getElementById("mydiv");
mydiv.setAttribute("class","textcolor");
}
</script>
</head>
<body>
<div id="mydiv"></div>
</body>
</html>
dom=(function(){
var fixAttr={
tabindex:'tabIndex',
readonly:'readOnly',
'for':'htmlFor',
'class':'className',
maxlength:'maxLength',
cellspacing:'cellSpacing',
cellpadding:'cellPadding',
rowspan:'rowSpan',
colspan:'colSpan',
usemap:'useMap',
frameborder:'frameBorder',
contenteditable:'contentEditable'
},
div=document.createElement('div');
div.setAttribute('class','t');
var supportSetAttr = div.className === 't';
return {
setAttr:function(el, name, val){
el.setAttribute(supportSetAttr ? name : (fixAttr[name] || name), val);
},
getAttr:function(el, name){
return el.getAttribute(supportSetAttr ? name : (fixAttr[name] || name));
}
}
})();
<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<style type="text/css">
.textcolor{
font-size:18px;
color:red;
}
</style>
<script type="text/javascript">
dom=(function(){
var fixAttr={
tabindex:'tabIndex',
readonly:'readOnly',
'for':'htmlFor',
'class':'className',
maxlength:'maxLength',
cellspacing:'cellSpacing',
cellpadding:'cellPadding',
rowspan:'rowSpan',
colspan:'colSpan',
usemap:'useMap',
frameborder:'frameBorder',
contenteditable:'contentEditable'
},
div=document.createElement('div');
div.setAttribute('class','t');
var supportSetAttr = div.className === 't';
return {
setAttr:function(el, name, val){
el.setAttribute(supportSetAttr ? name : (fixAttr[name] || name), val);
},
getAttr:function(el, name){
return el.getAttribute(supportSetAttr ? name : (fixAttr[name] || name));
}
}
})();
window.onload=function(){
var mydiv=document.getElementById("mydiv");
dom.setAttr(mydiv, 'class', 'textcolor');
}
</script>
</head>
<body>
</body>
</html>
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