$('t1').onblur = function(){ var v = parseInt(this.value); if ( isNaN(v) || v < 1 || v > 20 ) { alert('请输入 1-20的数字'); return false; }
} $('t2').onblur = function(){ var v = parseInt(this.value); if ( v < parseInt($('t1').value) || v > 20 ) { alert('出错!\n满足条件:input2大于等于input1'); return false; } } </script>
$('t1').onblur = function(){ var v = parseInt(this.value); if ( isNaN(v) || v < 1 || v > 20 ) { alert('请输入 1-20的数字'); return false; }
} $('t2').onblur = function(){ var v = parseInt(this.value); if ( v < parseInt($('t1').value)|| v > 20 ) { alert('出错!\n满足条件:input2大于等于input1'); return false; } } </script>
然后比较input1的值小于input2的值 input1.value<input2.value
input1<input type="text" id="t1" /><br />
input2:<input type="text" id="t2" />
<script>
var $ = function(o){return document.getElementById(o)}
$('t1').onblur = function(){
var v = parseInt(this.value);
if ( isNaN(v) || v < 1 || v > 20 ) {
alert('请输入 1-20的数字');
return false;
}
}
$('t2').onblur = function(){
var v = parseInt(this.value);
if ( v < parseInt($('t1').value) ) {
alert('出错!\n满足条件:input2大于等于input1');
return false;
}
}
</script>
input1<input type="text" id="t1" /><br />
input2:<input type="text" id="t2" />
<script>
var $ = function(o){return document.getElementById(o)}
$('t1').onblur = function(){
var v = parseInt(this.value);
if ( isNaN(v) || v < 1 || v > 20 ) {
alert('请输入 1-20的数字');
return false;
}
}
$('t2').onblur = function(){
var v = parseInt(this.value);
if ( v < parseInt($('t1').value) || v > 20 ) {
alert('出错!\n满足条件:input2大于等于input1');
return false;
}
}
</script>
input1<input type="text" id="t1" /><br />
input2:<input type="text" id="t2" />
<script>
var $ = function(o){return document.getElementById(o)}
$('t1').onblur = function(){
var v = parseInt(this.value);
if ( isNaN(v) || v < 1 || v > 20 ) {
alert('请输入 1-20的数字');
return false;
}
}
$('t2').onblur = function(){
var v = parseInt(this.value);
if ( v < parseInt($('t1').value)|| v > 20 ) {
alert('出错!\n满足条件:input2大于等于input1');
return false;
}
}
</script>