js_checklen.js

来自「不错的ASP整站源代码。在IIS环境下运行都没有问题」· JavaScript 代码 · 共 42 行

function NoteHint(F){

	s=self.document.form.note.value;
	len=s.length;

	if(len>50){
	        document.form.note_charleft.value = "留言太长了!";
        	document.form.note_charleft.style.color = "#FF0000";
        	return;
	}

	count=0;
	var ch=0;
	for(i=0;i<len;i++){
		ch=s.charCodeAt(i)&0xffff;
		if(ch<0xff){
			count++;
		}
		else{
			count+=2;
		}
	}
	count=100-count;
	
        var col = "#000000";
	var num1;
        if(count >= 0) {
                num1 = "剩余字符长度：" + count;
                col = "#CC3300";
        } 
        else {
        	num2 = (-1) * count;
                num1 = "约会留言超长" + num2 + "字符";
                col = "#FF0000";
        }
        document.form.note_charleft.value = num1;
        document.form.note_charleft.style.color = col;
}


//-->
</SCRIPT>