Making a Password Confirmation in PHP

This is very straight forward, if password a and b are not equal to each other, how can I let the user know that with out losing all of the entered information on the registration form? I was trying this: ---$p1 = "<input type=\"password\" name=\"usr_p1\" />"; $p2 = "<input type=\"password\" name=\"usr_p2\" />"; // if they didn't match return $p1 = "<input type=\"password\" name=\"usr_p1\" value=\"" . $p1 . "\"/>";--- I was trying to change the value of the variable which shows the input field to have the password already in it. and either one would just be echo'd depending on the result. Any ideas please? From,Michael Calkinsmichaelcalkins@live.com elementFontfont-familyfont-sizefont-stylefont-variantfont-weightletter-spacingline-heighttext-decorationtext-aligntext-indenttext-transformwhite-spaceword-spacingcolorBackgroundbg-attachmentbg-colorbg-imagebg-positionbg-repeatBoxwidthheightborder-topborder-rightborder-bottomborder-leftmarginpaddingmax-heightmin-heightmax-widthmin-widthoutline-coloroutline-styleoutline-widthPositioningpositiontopbottomrightleftfloatdisplayclearz-indexListlist-style-imagelist-style-typelist-style-positionTablevertical-alignborder-collapseborder-spacingcaption-sideempty-cellstable-layoutEffectstext-shadow-webkit-box-shadowborder-radiusOtheroverflowcursorvisibility _________________________________________________________________ Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_1