How to get value from ID

i saw a code where they don’t mention input field name and other things how we can get value of input from ID attribute in they are using jquery i think
here is example code

<table class="tab-form">
					<tbody id="ztable">

						<tr class="scnd" id="row1">
							<td class="td-num" style="width: 25px;">1</td>
							<td class="td-pin">
								<input type="text" class="inp pin" maxlength="4" /> - <input type="text" class="inp pin" maxlength="4" /> - <input type="text" class="inp pin" maxlength="4" /> - <input type="text" class="inp pin last_pin" maxlength="4" />

							<td class="td-hint">
								<img src="/images/ico-quest.gif" width="18" height="18" alt="" class="show_help_btn cursor_p" />
							<td class="td-pasw" style="width: 173px;">
								<img src="/images/but-pasw_en.gif" width="152" height="20" alt="" class="show_pass_btn cursor_p" />
								<div class="pass_box"><span id="pass_first"></span><input type="password" class="inp_pass" /></div>
							<td class="td-online">

								<input type="checkbox" class="mobile_chk mobile_psc" />
								<img src="/images/ico-quest.gif" width="18" height="18" alt="" class="show_online_btn cursor_p" />
							<td class="td-val td-center" style="width: 80px;">
								<select class="psc_val" onchange="calc_summ();">
									<option value="EUR" selected="selected">EUR</option>
									<option value="CHF">CHF</option>
									<option value="GBP">GBP</option>

									<option value="RON">RON</option>
									<option value="CZK">CZK</option>
									<option value="NOK">NOK</option>
								<img src="/images/ico-quest.gif" width="18" height="18" alt="" class="cursor_p show_hint_btn2" />
								<input type="hidden" class="currency" />

							<td class="td-nomin">
								<input type="text" class="inp summ nominal" value="0" onblur="nom_blur(this);" onfocus="nom_focus(this);" /><input type="hidden" class="rate" /><input type="hidden" class="cvalue" />
							<td class="td-del">&nbsp;</td>


which element do you want the value of?

off all input fields

ok, if they didn’t use element names or id’s they probably used the document.forms.elements array to get the input values

they are using id on TR how i can get value using tr class of each input field separetly

anybody can explain using which id i can get values in my action script

this is the actual website link
there action is going in CGI Bin but how can i get the values in php
using the same condition

you can use

function getElementsByClassName(oElm, strTagName, strClassName) {
    var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    strClassName = strClassName.replace(/\\-/g, "\\\\-");
    var oRegExp = new RegExp("(^|\\\\s)" + strClassName + "([\\\\s|$](file://\\\\s|$))");
    var oElement;
    for(var i=0; i<arrElements.length; i++) {
        oElement = arrElements[i];
    return (arrReturnElements)

to get an array of all the elements with a given class.

then you can loop through that array and get all the input elements and output their current values.