Php-js Determine whether the text box is empty, why my code can not judge, on the pointing

Phphtmljavascrpit

$conn = mysql_connect (' localhost ', ' root ', ' admin ') or die (' could not connect: '. Mysql_error ());
mysql_select_db (' sybgtjxt ') or die (' could not select database ');
mysql_query ("Set names GBK");

?>

Lab Report Submission System
H2, font {font-style:oblique; color: #FCC898; font-weight:normal id=top; valign =top; position:relative;} function Yanzheng () {var cname = document.getElementById ("CNAME"). value; var tname = document.getElementById ("Tname"). Value var Ppro = document.getElementById ("Ppro"). Value; var pgrade = document.getElementById ("Pgrade"). Value; var pcol = document.getElementById ("Pcol"). Value; var pcutdate = document.getElementById ("Pcutdate"). Value; var pname = document.getElementById ("PName"). Value; var paim = Document.form1.paim.value; var pcontent = document.getElementById ("Pcontent"). Value; var pstep = document.getElementById ("Pstep"). Value; var Panalyse = document.getElementById ("Panalyse"). Value; var presult = document.getElementById ("Presult"). Value; This function does not implement if (cname== ") {Window.alert (" Please enter all contents "); return false;}} function Reset () {document.getElementById ("CNAME"). Value = ""; document.getElementById ("Tname"). Value = 0; document.getElementById ("Ppro"). Value = 0; Document.geteleMentbyid ("Pgrade"). Value = 0; document.getElementById ("Pcol"). Value = 0; document.getElementById ("Pcutdate"). Value = ""; document.getElementById ("PName"). Value = ""; document.getElementById ("Paim"). Value = ""; document.getElementById ("Pcontent"). Value = ""; document.getElementById ("Pstep"). Value = ""; document.getElementById ("Panalyse"). Value = ""; document.getElementById ("Presult"). Value = "";} function Yyyymmddstart () {monhead = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];///give under decade the contents of the frame var y = new Date (). getf Ullyear (); for (var i = (y-30); i < (y+30); i++)//Based on this year, first 30 years, 30 years after Document.form1.YYYY.options.add (new Option ("" + I, i)); Assigns the month drop-down box for (var i = 1; i < i++) {if (i>=1&&i<10) Document.form1.MM.options.add (New Option ("" + "0" + I, i)); else{Document.form1.MM.options.add (New Option ("" +i, I));}} Document.form1.YYYY.value = y; Document.form1.MM.value = new Date (). GetMonth () + 1; var n = monhead[new Date (). GetMonth ()]; if (new Date (). GetMonth () ==1 &AMP;&Amp Ispinyear (Yyyyvalue)) n++; Writeday (n); Assignment Date drop-down box Document.form1.DD.value = new Date (). GetDate (); } if (document.attachevent) window.attachevent ("onload", Yyyymmddstart); else Window.addeventlistener (' Load ', Yyyymmddstart, false); function Yyyydd (str)//year changes in date (mainly judging leap common year) {var mmvalue = document.form1.mm.options[ Document.form1.mm.selectedindex].value; if (Mmvalue = = "") {var e = Document.form1.DD; Optionsclear (e); return;} var n = monhead[mmvalue-1]; if (Mmvalue ==2 && ispinyear (str)) n++; Writeday (N)} function MMDD (str)//month changed date linkage {var yyyyvalue = document.form1.yyyy.options[ Document.form1.yyyy.selectedindex].value; if (Yyyyvalue = = "") {var e = Document.form1.DD; Optionsclear (e); return;} var n = monhead[str-1]; if (str ==2 && ispinyear (yyyyvalue)) n++; Writeday (N)} function Writeday (n)//The drop-down box of the conditional write date {var e = Document.form1.DD; Optionsclear (e); for (var I=1; i< (n+1); i+ +) E.options.add (new Option ("" + I, I));} function Ispinyear (year)//Determine if leap common year {RETurn (0 = = year%4 && (year%100!=0 | | year%400 = 0)); } function Optionsclear (e) {e.options.length = 1;}

Onsubmit= "return Yanzheng ();" >

Job Placement

Course Name:
Instructor:	Please select /option>!--? php $sql = "Select Tname from Tblteacher", $result = mysql_query ($sql); while ($row = Mysql_fetch_ Assoc ($result)) {?>     :	Please select !--? php $sql = "Select Colna Me from college "; $result = mysql_query ($sql); while ($row = Mysql_fetch_assoc ($result)) { , Special     :	Select !--? php $sql = "Select Pro_name from Pro"; $result = mysql_query ($sql); while ($row = Mysql_fetch_assoc ($result)) { , Year     :	Select !--? php $sql = "Select Sgrade from Tblstudent"; $result = mysql_query ($sql); while ($row = Mysql_fetch_assoc ($result)) { ? Due Date:	Year Month Day
Experiment Name:
Experimental Purpose:
Experimental content:
Experimental steps:
Experimental results:
Analysis and discussion:




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