为 JS 添加 类似php的 in_array()方法.

Array.prototype.inArray = function (value)
//Returns true if the passed value is found in the
//array.  Returns false if it is not.
{
var i;
for (i=0; i < this.length; i++){
// Matches identical (===), not just similar (==).
if (this[i] === value){
return true;
}
}
return false;
};

调用的例子:
var objArr = document.getElementByName("text");
var testString = "testValue";
if (objArr.inArray(testString)){
return true;
}else{
return false;
}