<!doctype html> <html> <head> <meta charset="utf-8"> <title>价格录入限定</title> <script type="text/javascript"> /** * 实时动态强制更改用户录入 * arg1 inputObject **/ function amount(th){ var regStrs = [ [‘^0(\\d+)$‘, ‘$1‘], //禁止录入整数部分两位以上,但首位为0 [‘[^\\d\\.]+$‘, ‘‘], //禁止录入任何非数字和点 [‘\\.(\\d?)\\.+‘, ‘.$1‘], //禁止录入两个以上的点 [‘^(\\d+\\.\\d{2}).+‘, ‘$1‘] //禁止录入小数点后两位以上 ]; for(i=0; i<regStrs.length; i++){ var reg = new RegExp(regStrs[i][0]); th.value = th.value.replace(reg, regStrs[i][1]); } } /** * 录入完成后,输入模式失去焦点后对录入进行判断并强制更改,并对小数点进行0补全 * arg1 inputObject * 这个函数写得很傻,是我很早以前写的了,没有进行优化,但功能十分齐全,你尝试着使用 * 其实有一种可以更快速的JavaScript内置函数可以提取杂乱数据中的数字: * parseFloat(‘10‘); **/ function overFormat(th){ var v = th.value; if(v === ‘‘){ v = ‘0.00‘; }else if(v === ‘0‘){ v = ‘0.00‘; }else if(v === ‘0.‘){ v = ‘0.00‘; }else if(/^0+\d+\.?\d*.*$/.test(v)){ v = v.replace(/^0+(\d+\.?\d*).*$/, ‘$1‘); v = inp.getRightPriceFormat(v).val; }else if(/^0\.\d$/.test(v)){ v = v + ‘0‘; }else if(!/^\d+\.\d{2}$/.test(v)){ if(/^\d+\.\d{2}.+/.test(v)){ v = v.replace(/^(\d+\.\d{2}).*$/, ‘$1‘); }else if(/^\d+$/.test(v)){ v = v + ‘.00‘; }else if(/^\d+\.$/.test(v)){ v = v + ‘00‘; }else if(/^\d+\.\d$/.test(v)){ v = v + ‘0‘; }else if(/^[^\d]+\d+\.?\d*$/.test(v)){ v = v.replace(/^[^\d]+(\d+\.?\d*)$/, ‘$1‘); }else if(/\d+/.test(v)){ v = v.replace(/^[^\d]*(\d+\.?\d*).*$/, ‘$1‘); ty = false; }else if(/^0+\d+\.?\d*$/.test(v)){ v = v.replace(/^0+(\d+\.?\d*)$/, ‘$1‘); ty = false; }else{ v = ‘0.00‘; } } th.value = v; } </script> </head> <body> <input type="text" name="price" value="" onKeyUp="amount(this)" onBlur="overFormat(this)" /> </body> </html>