function Trim(str)
{
return str.replace(/^\s+|\s+$/g, ""); //去除字符串两边的空白符
//return this.replace(/^\s+/g,"").replace(/\s$+/g,"");//去除字符串两边的空白符
//return this.replace(/^\s+/g,"");//去除字符串左边的空白符
//return this.replace(/\s$+/g,"");//去除字符串右边边的空白符
}
html中文本框只能输入中文英文数字下划线组合:
function checkInput()
{
var str=document.getElementById("name").value;
if(/^[\u4e00-\u9fa5_a-zA-Z0-9]+$/.test(str)){
alert("输入ok");
}else{
alert("输入error");
}
}