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jquery map和each 获取dom元素最大值
<!DOCTYPE html>
<html>
<head>
<style>
div { width: 40px; float:left; }
input { clear:left}
</style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
<input type="button" value="equalize div heights">
<div style="background:red; height: 40px; ">1</div>
<div style="background:green; height: 70px;">2</div>
<div style="background:blue; height: 50px; ">3</div>
<script>
$.fn.equalizeHeights = function(){
var that = this,
arrHeight = [];
/* this.each(function(i, n){
arrHeight.push($(n).height());
//alert($(n).html())
//alert(document.getElementsByTagName(n)[i].innerHTML)
});*/
var arrHeight = this.map(function(i, n){
return $(n).height();
//alert($(n).html())
//alert(document.getElementsByTagName(n)[i].innerHTML)
}).get();
var maxheight = function(arr){
var maxValue;
for( var i=0, len = arr.length; i < len; i++){
if(i > 0 && arr[i] > arr[i-1]){
maxValue = arr[i];
}
}
return maxValue;
};
that.css({"height": maxheight(arrHeight)});
// that.css({"height": Math.max.apply(this, arrHeight) });
};
$("input").click(function(){
$("div").equalizeHeights();
});
</script>
</body>
</html>