嗨我使用javascript函数来点击ma文本框时,最初文本框包含各自的标签名称,例如:客户名称,公司等。单击文本框时,文本框为空,因此数据可以是类型。为此我使用的是javascript函数,对于每个文本框,我必须有一个单独的函数,任何人都可以告诉我如何组合所有这些函数,每个函数中唯一不同的是文本框中使用的值和文本框名称
Javascript功能
function clientnameclear() {
if(document.bunkerfrm.clientname.value=="Client Name") {
var bunkerfrm = document.bunkerfrm.clientname.value="";
var bunkerfrm = document.bunkerfrm.clientname.focus();
}
else {
var bunkerfrm = document.bunkerfrm.clientname.focus();
}
}
function clientnamereset() {
if(document.bunkerfrm.clientname.value=="") {
var bunkerfrm = document.bunkerfrm.clientname.value="Client Name";
}
}
function vesselnameclear() {
if(document.bunkerfrm.vesselname.value=="Vessel Name") {
var bunkerfrm = document.bunkerfrm.vesselname.value="";
var bunkerfrm = document.bunkerfrm.vesselname.focus();
}
else {
var bunkerfrm = document.bunkerfrm.vesselname.focus();
}
}
function vesselnamereset() {
if(document.bunkerfrm.vesselname.value=="") {
var bunkerfrm = document.bunkerfrm.vesselname.value="Vessel Name";
}
}
function compclear() {
if(document.bunkerfrm.company.value=="Company") {
var bunkerfrm = document.bunkerfrm.company.value="";
var bunkerfrm = document.bunkerfrm.company.focus();
}
else {
var bunkerfrm = document.bunkerfrm.company.focus();
}
}
function compreset() {
if(document.bunkerfrm.company.value=="") {
var bunkerfrm = document.bunkerfrm.company.value="Company";
}
}
Html代码
<form name="bunkerfrm" id="bunkerfrm" action="#" method="post"><br>
<input type="text" name="clientname" class="txtbox" value="Client Name" onmousedown="clientnameclear()" onclick="clientnameclear()" onblur="clientnamereset()" />
<br /><br>
<input type="text" name="company" class="txtbox" value="Company" onmousedown="compclear()" onclick="compclear()" onblur="compreset()" />
<br /><br>
<input type="submit" name="submitting" class="bunksubmit" value="Send Your Inquiry" /><br>
</form>
答案 0 :(得分:2)
首先,将默认值存储在某处,例如给定输入的alt
。
<form name="bunkerfrm" id="bunkerfrm" action="#" method="post"><br>
<input type="text" name="clientname" alt="Client Name" class="txtbox" value="Client Name" onfocus="clear_text(this);" onblur="reset_text(this);" />
<br /><br>
<input type="text" name="company" class="txtbox" alt="Company" value="Company" onfocus="clear_text(this);" onblur="reset_text(this);" />
<br /><br>
<input type="submit" name="submitting" class="bunksubmit" value="Send Your Inquiry" /><br>
</form>
然后将输入元素this
作为参数传递给这些onfocus / onblur函数:
function clear_text(elem)
{
if (elem.value == elem.alt)
elem.value = "";
}
function reset_text(elem)
{
if (elem.value == "")
elem.value = elem.alt;
}
如果输入获得焦点,如果其值与alt
属性中存储的占位符相同,则会清除输入。事件onblur
将触发reset_text
函数,该函数将检查该值是否为空并将其还原为存储在alt
属性中的默认占位符。
答案 1 :(得分:1)
使用placeholder
:
<input type="text" name="clientname" placeholder="Client Name" class="txtbox" />
<br /><br>
<input type="text" name="company" class="txtbox" placeholder="Company" />
<br /><br>
<input type="submit" name="submitting" class="bunksubmit" placeholder="Send Your Inquiry" /><br>
</form>
答案 2 :(得分:0)
我建议您使用和/或研究现有的库,例如: