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function check() {
var str = document.myform.txtUser.value;
//È¡µ½valueÒÔºó½ÓÏÂÀ´ÈçºÎÓÃÕýÔò±í´ïʽÑé֤Ĩ?
}
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function check() {
var str = document.myform.txtUser.value;
//È¡µ½valueÒÔºó½ÓÏÂÀ´ÈçºÎÓÃÕýÔò±í´ïʽÑé֤Ĩ?
if(str.length<1){
alert("Ϊ¿Õ");
return false;//·Ç¿Õ²»ÓÃÕýÔòµÄ
}
}
2,¼ÈȻҪ±ØÐëÑ¡ÖÐÒ»¸ö Ò²²»ÓÃÑéÖ¤ÁË Ö±½ÓĬÈÏÉèÖÃһϠÔÚhtmlÖРд checked »ò selected
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str=trim(str);ÕâÑù¿Õ¸ñ¾ÍûÊÂÁË
var arr = document.getElementsByName("checkboxname");
var x=0
for(var i=0;i<arr.length;i++){
if(arr[i].checked){
x=x+1
}
}
if(x==0){
alert("±ØÐëѡһ¸ö");
return false;
}
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function ltrim(str){
return str.replace( /^[" "|"¡¡"]*/, "");
}
function rtrim(str){
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