JS 过滤特殊字符

<input type = "text" value = "" id = "inputvalue" onblur ="checkSpecialCharacter(this)" >
<script>

/**过滤表单中的特殊字符*/
function checkSpecialCharacter(inputvalue)       
{   
	var str=inputvalue.value;
	var SPECIAL_STR ="￥#$~!@%^&*();'\"?><[]{}\\|,:/=+—“”‘";
	for(i=0;i<str.length;i++)
	if (SPECIAL_STR.indexOf(str.charAt(i)) !=-1) {
	    alert("不能填写非法字符("+str.charAt(i)+")！");
	    inputvalue.value='';
	    inputvalue.focus();
	    return false;
	}
	return true;
}  
alert (checkAllTextValid(document.getElementById("inputvalue")) );
</script>