textarea文字输入字数限制,不超300
300
functioncheckLen(obj){
varmaxChars=300;//最多字符数
if(obj.value.length>maxChars)obj.value=obj.value.substring(0,maxChars);
varcurr=maxChars-obj.value.length;
document.getElementById("count").innerHTML=curr.toString();
}
2htmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""/TR/xhtml1/DTD/xhtml1-transitional.dtd">
jquery限制输入字数,并提示剩余字数
functionwords_deal(){
varcurLength=$("#TextArea1").val().length;
if(curLength>5){
varnum=$("#TextArea1").val().substr(0,5);
$("#TextArea1").val(num);
alert("超过字数限制,多出的字将被截断!");
}else{
$("#textCount").text(5-$("#TextArea1").val().length);
}
}
剩余5个字
3
str=getElementById('text').value
if(str.length<6){
returnfalse;
alert('小于六位');
}