日期:2014-05-16 浏览次数:20336 次
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<html> <head> <script type="text/javascript" src="test.js"></script> <script> function updown(){ var arr=["3","20","30","50","1"] arr.sort(a); alert(arr.toString()); arr.reverse(); alert(arr); function a(x,y){ return -x.localeCompare(y); } } //function chongfu(){ Array.prototype.distinct = function() { var ret = []; for (var i = 0; i < this.length; i++) { for (var j = i+1; j < this.length;) { if (this[i] === this[j]) { ret.push(this.splice(j, 1)[0]); } else { j++; } } } return ret; } //for test alert(['a','b','c','d','b','a','e'].distinct()) //} </script> </head> <body> <div id="clean"> <button id="b" onClick="updown()">button1</button> </div> <div id="clean"> <button id="c" onClick="">button2</button> </div> </body> </html>
?经过观察发现,脚本的执行有两种途径.
一种是在加载页面的时候执行.
一种是需要触发某个事件的时候执行.