欧美在线小视频_成人午夜sm精品久久久久久久_综合国产第二页_蜜乳av一区二区三区

   1.文本框只能輸入數(shù)字代碼(小數(shù)點也不能輸入)
    keyup="this.value=this.value.replace(/\D/g,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')">

   2.只能輸入數(shù)字,能輸小數(shù)點.
    keyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')">
    change="if(/\D/.test(this.value)){alert('只能輸入數(shù)字');this.value='';}">

   3.數(shù)字和小數(shù)點方法二
    keypress="if(!this.value.match(/^[\+\-]?\d*?\.?\d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?)?$/))this.o_value=this.value" onkeyup="if(!this.value.match(/^[\+\-]?\d*?\.?\d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?)?$/))this.o_value=this.value" onblur="if(!this.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?|\.\d*?)?$/))this.value=this.o_value;else{if(this.value.match(/^\.\d+$/))this.value=0+this.value;if(this.value.match(/^\.$/))this.value=0;this.o_value=this.value}">

可以封裝成單獨的函數(shù)

 function keyPress(ob) {
            if (!ob.value.match(/^[\+\-]?\d*?\.?\d*?$/)) ob.value = ob.t_value; else ob.t_value = ob.value; if (ob.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?)?$/)) ob.o_value = ob.value;
        }
        function keyUp(ob) {
            if (!ob.value.match(/^[\+\-]?\d*?\.?\d*?$/)) ob.value = ob.t_value; else ob.t_value = ob.value; if (ob.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?)?$/)) ob.o_value = ob.value;
        }
        function onBlur(ob) {
         if(!ob.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?|\.\d*?)?$/))ob.value=ob.o_value;else{if(ob.value.match(/^\.\d+$/))ob.value=0+ob.value;if(ob.value.match(/^\.$/))ob.value=0;ob.o_value=ob.value};
        }

只需在調(diào)用，傳入this對象即可!

   4.只能輸入字母和漢字
    keyup="value=value.replace(/[\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[\d]/g,''))" maxlength=10 name="Numbers">

   5.只能輸入英文字母和數(shù)字,不能輸入中文
    keyup="value=value.replace(/[^\w\.\/]/ig,'')">

   6.只能輸入數(shù)字和英文
    KeyUp="value=value.replace(/[^\d|chun]/g,'')">

    7.小數(shù)點后只能有多兩位(數(shù)字,中文都可輸入),不能輸入字母和運算符號:
    KeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || /\.\d\d$/.test(value))event.returnValue=false">

    8.小數(shù)點后只能有多兩位(數(shù)字,字母,中文都可輸入),可以輸入運算符號:
    keyup="this.value=this.value.replace(/^(\-)*(\d+)\.(\d\d).*$/,'$1$2.$3')">