javascript:去除字符串的前后空格

By Ben

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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“