限制字符串长度

var limitLength = document.getElementById(‘limitLength‘);
            var maxRegex = /\s+/g;//去除空格的正则表达式
            var  maxLength = function(tThis){
                var _v = tThis.value.replace(maxRegex,‘‘), //获取输入文本(去除空格)
                    _vLen = _v.length,
                    dataLength = tThis.getAttribute(‘data-length‘), //获取限制长度
                    dataModel = tThis.getAttribute(‘data-model‘),
                    subLen = dataLength;
                    
                if(_vLen > dataLength){
                    tThis.value = _v.substr(0,subLen);  //判断长度，超过长度自动截取
                }
            }
            
            limitLength.onblur = function(){
                maxLength(this);
            }
            
            limitLength.onkeyup = function(){
                maxLength(this);
            }
            
            limitLength.onfocus = function(){
                maxLength(this);
            }