方法一: function KillSpace(x){ while((x.length>0) && (x.charAt(0)==' ')) x = x.substring(1,x.length); //while((x.length>0) && (x.charAt(x.length-1)==' ')) while(x.length>0) x = x.substring(0,x.length-1); alert("Kill=" + x + "==") return x; } 实例: var a = KillSpace(“ abc “); //得出a == “abc“
方法二: String.prototype.trim = function() { return this.replace(/(^\s+)|\s+$/g,""); } 实例: var a = “ abc “.trim(); //得出a == “abc“ 
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